The statistical formula used to gauge the comprehensibility levels – low comprehensibility, moderate comprehensibility, and high comprehensibility were based on the number of questions in each spoken variety.
Where 5 was the highest score in each comprehension test and 0 was the lowest score, the range was calculated divided by three intervals, which was 1.66. The same formula was used in the calculation of interval 3.33 within 10, the summation of combined questions in two spoken texts of each variety. The above descriptions are reflected in Table 3.
Figure 3: Comprehensibility testing flowchart
Adopted from Wilang & Teo (2012c)